Remove duplicate Queue elements

src/EscapeBot.java

             queue.add(new Move(start + directions[i][0], start + directions[i][1], commands[i]));
         }
 
-        queue.add(new Move(start, start - 1, '^'));
-        queue.add(new Move(start, start + 1, '>'));
-        queue.add(new Move(start + 1, start, '>'));
-        queue.add(new Move(start - 1, start, '<'));
-
         while (!queue.isEmpty()) {
             Move move = queue.poll();
             if (move.x < 0 || move.x >= size || move.y < 0 || move.y >= size || visited[move.x][move.y]) continue;

src/RumbleBot.java

             queue.add(new Move(start + directions[i][0], start + directions[i][1], commands[i]));
         }
 
-        queue.add(new Move(start, start - 1, '^'));
-        queue.add(new Move(start, start + 1, '>'));
-        queue.add(new Move(start + 1, start, '>'));
-        queue.add(new Move(start - 1, start, '<'));
-
         while (!queue.isEmpty()) {
             Move move = queue.poll();
             if (move.x < 0 || move.x >= size || move.y < 0 || move.y >= size || visited[move.x][move.y]) continue;

src/SnakeBot.java

             queue.add(new Move(start + directions[i][0], start + directions[i][1], commands[i]));
         }
 
-        queue.add(new Move(start, start - 1, '^'));
-        queue.add(new Move(start, start + 1, '>'));
-        queue.add(new Move(start + 1, start, '>'));
-        queue.add(new Move(start - 1, start, '<'));
-
         while (!queue.isEmpty()) {
             Move move = queue.poll();
             if (move.x < 0 || move.x >= size || move.y < 0 || move.y >= size || visited[move.x][move.y]) continue;